RE: [Xen-ia64-devel] Time for hybrid virtualization?

[tgingold@xxxxxxx]

Quoting "Dong, Eddie" <eddie.dong@xxxxxxxxx>:

> tgingold@xxxxxxx wrote:
> > Quoting "Dong, Eddie" <eddie.dong@xxxxxxxxx>:
> >> Not sure if anybody ever tried to run Xen/IA64 VMM in Xen/IA64 HVM
> >> guest? It may not be already there, but looks like not that far.
> >
> > I tried in the past, but it doesn't work out of the box.  You of
> > course can't run bare Xen within VTi, but a modified version can run.
>
> Why?  The goal of hardware virtualization is to provide architecture
> equavalent virtualization. We may see the gap.

Xen requires 61 bits of VA, while Vti only provides 60.  That's the main issue
my patch addresses.  The other issue is VHPT long format.  Currently Xen/VTi
allows it but doesn't use it.

It would be nice if Xen can work with any VA size.  I am thinking about how to
do that.

Tristan.

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